Potato masher



' Ma 7, 1929. DOLL 1,712,424

I ro'rA'ro msnsa Filed June 13. 1928 d Fig.1

I 1 1; i b o f Unvenldr Patented May 7, 1929.

1 'NITED STATES L'UDWIG DOLL, OF HEIDELSHEIM, GEREANY.

ro'ra'ro insane.

Application fi1ed J'une 13,;1928, Serial No. 285,096, and in Germany ama 6, 192a.

My invention relates to a device for mashing potatoes, vegetables andthe like and has for its object. to provide an improved construction .which is very convenient of operat5 tion and which permits of'rapid and effective mashing with slight expenditure of power. There are already known constructions comprising a perforatedcontainer and an os- .cillating. pressure member so contrived that it) the pressure member sweeps past one perforated wall of the container, entrains the goods the goods must be brought into a pulpy condition by the pressure before they can penetrate the perforations. It was thus not always practicable to fasten the device by means of a bracket or the like to a table, as

the fastening screws were liable to work loose by thepressure or the table was damaged.

These drawbacks are overcome by the present invention in which the lateral wall of the container, comprises a semi-cylindrical part and a part forming an extension thereof and having a radius of curvature equal to the di-.

ameter of the semi-cylindrical part, the axis of oscillation of the pressure member which conforms in shape to the container being substantially coincident-with one generatrix located in the diametral plane of the semi-cylindrical part of the container and of the pressure member.

With this formation it is possible to ensure that the pressure member co-operating with a perforated wall will exercise a grating action in addition to a pressing action.

Further, the perforations in the container, which may be stamped for example from metalusually employed for graters, are each associated with an inclined cutter-blade located behind the perforation considered in the direction of movement of the pressure member, such blade projecting into the interior of the container, so that, besidesthe grating action there is effected a shaving action.

To adapt'the device for use in mashing all kinds of fruits, vegetables or the like the container may be simply hooked in position so asto be readily exchangeable. that is,'so

that it can be replaced by another container having a different number and different di- 'aIneters of perforations.

a construction according to my inventron the container with the pressure member 18- supported by'an overhanging bracket at an-elevated position such that a dish may be mounted below the container, such bracket belngfastened to a. table by screw-clamps or the like. i v

To prevent the bracket from becoming loose in the use ofthe device the lever for oscillating the pressure member is so disposed that the direction of maximum pressure exercised thereon is located substantiallydn the ytlairtical plane containing the screws or the Preferably the screws or the like for fastening the bracket to the table are located alongside two adjacent edges of the table like to be mashed. (lo-operating with the container is a pressure member at. The overhang is such that a basin 6 or other dish can be placed beneath the container to receive the mashed goods. The bracket a'. is fitted with two clamps f each having a clamping screw V 9 so that the bracket can be secured at two I adjoining edges of the table it near one corner thereof. The pressure member d is connected to an oscillatory lever i conveniently formed as a yoke so located that in the use of the device thedirection of the maximum pressure exercised is in a vertical plane substantially passing through the clamping screws 9 so that a minimum bending stress is exercised on the bracket and loosening of the bracket or injury to the table is prevented. In order that the device may be used with difl'erent kinds of fruits, vegetables and the like, the container 6 is removably fitted to.

forations of different dimensions. As shown in Fig. 2 the perforations Z of the container I are so punched out that there is located behind each perforation, consideredin the direction of movement of the ressure member (1, an angled knife-like mem er m projecting into the interior of the container. The lateral wall of the container 6 comprises a semi-cylindrical part b and a part b forming an extension thereof and having a radius of curvature equal to the diameter of the semicglindrical part. The container is prefera ly so constructed that the diametrical plane m-a: of the semi-cylindrical part is inclined' to the horizontal. As shown in Fig. 3, the axis of oscillation of the pressure member d, which conforms with the container 6, is so disposed that in final position the pressure member fits exactly within the container b. With this form and'relative arrangement of the pressure member and the container the pressure member d closes the container b as soon as the generatrix located on the plane y passing through the axis arrives at the level of the free edge of the container part b. As the pressure face of the pressure member (1 not only performs a movement towards the wall of the container 1) but also exercises a thrust, there is effected not only a pressing action but also a shaving action in the sense that the goods are shaved by the knives, so that less power is required for mashing the goods.

What I claim as my invention and desire to secure by Letters Patent of the United States, is

1. A device for mashing potatoes and the like, comprising, in combination, a perforated container for the goods to be mashed, the wall of said container consisting of a semicylindrical part and another part forming-a continuation thereof and having a radius of curvature about equal to the diameter of said semi-cylindrical part, and a pressure member conforming with said container, the axis of oscillation of said pressure member coinciding approximately with a generatrix located in a diametral plane of said semi-cylindrical part both of said container and of said pressure member.

2. A device for mashin potatoes and the like, comprising, in combination, a perforated container for the goods to be mashed, the wall of said container consisting of a semi-cylindrical part and another part forming a continuation thereof and having a radius of curvature about equal to the diameter of said semi-cylindricatpart, and a pressure member conforming with said container, the axis of oscillation of said pressure member coinciding approximately with a generatrix located in a diametral plane of said semicylindrical part both of said container and of said pressure member, each perforation of said container being provided with a bladelike part projecting at an angle into the interior of said container.

3. A device for mashing potatoes and the like, comprising, in combination, a perforated container for the goods to be mashed, the wall of said container consisting of a semi-cylindrical part and another part forming a continuation thereof and having a radius of curvature about equal to the diameter of said semi-cylindrical part, a pressure member conforming with said container, the axis of oscillation of said pressure member coinciding approximately with a generatrix located in a diametral plane of said semi-cylindrical part both of said container and of said pressure member, and a bracket-like structure adapted to carry said container and pressure member in such a manner thata receiving vessel can be placed below said container.

4. A device for mashing potatoes and the like, comprising, in combination, a perforated container for the goods to be mashed, the wall -pf said container consisting of a semi-cylindrical part and another part forming a continuation thereof and havin a radius of curvature about'equal to the diameter of said semi-cylindrical part, a pressure member conforming with said container, the axis of oscillation of said pressure member coinciding approximately with a generatrix located in a diametral plane of said semi-cylindrical part both of said container and of said pressure member, a bracket-like structure adapted to carry said container and said pressure member and on said structure means whereby said device may be secured to a table, said means being disposed within that vertical plane in which the maximum pressure is usually exercised upon said pressure member.

5. A device for mashing potatoes and the like, comprising, in combination, a perforated container for the goodsto be mashed, the wall of said container consisting of a semi-cylindrical part and another part forming a continuation thereof and having a radius of curvature about equal to the diameter of said semi-cylindrical part, a pressure member conforming with said container, the axis of oscillation of said pressure member coinciding approximately with a generatrix located in a diametral plane of said semi-cylindrical part both of said container and of said pressure member, a bracket-like structure adapted to carry said container and pressure member in such a manner that a receiving vessel can beplaced below said container, and on said bracket-like structure clamping means disposed at an angle in such'a manner that b said means'said structure can be fastened a jacent to two adjoining edges of a table.

6. A device for mashing potatoes and the like, comprising, in combination, a perforated container for the goods to be-mashed, the wall of said container consisting of a semicylindrical partand another part forming a continuation thereof and having a radius of curvature about equal to the diameter of said semi-cylindrical part, a pressure member conforming with said container, the axis of oscillation of said pressure member coinciding approximately with a, generatrix located in a diametral plane of said semi-cylindrical part both of said container and of said pressure member, each perforation of said container being provided'with a blade-like part projecting at an, angle into the interior of said contain er, a bracket-like structure adapted to carry said container and said pressure member, and on said structure means whereby said device may be secured, said means being disposed Within that vertical plane in which the maximum pressure is usually exercised upon said pressure member.

I LUDWIG DOLL. 

